Decommissioned 20 July 1946.
Recommissioned 6 September 1951.
Decommissioned 19 August 1955.
Recommissioned 11 April 1957.
Decommissioned 9 March 1962.
Stricken 15 April 1968.
Sold 17 March 1971 to be broken up for scrap.

10 Nov 1943USS Crevalle (Cdr. H.G. Munson, USN) attacked a Japanese convoy east of Mindoro, Philippines. No hits were obtained although it was hought at the time that one ship had been damaged.

(All times are zone H, -8)
1143 hours - In position 12°52'N, 121°46'E sighted smoke to the eastward, commenced approach and presently determined target to consist of one trawler type escort vessel of about 800 tons, one 1700 tons coal burning transport ship, one 5640 tons coal burning transport and one 4400 tons coal burning transport. The convoy was tracked on a base course of 320°(T) at a speed of 8 knots. When first sighted the range was 16000 yards.

1243 hours - The best possible attack position was reached which was at a range of 2200 yards from the second and largest transport. In position 12°52'N, 121°46'E fired six bow torpedoes at this ship which was by now overlapping with the third transport. The first two torpedoes prematured 37 and 36 seconds after they had been fired. It is thought that the sixth torpedo either hit the target or the ship beyond.

1249 hours - Fired four stern torpedoes at the second transport. Again the first two torpedoes fired prematured. The result of the other two torpedoes could not be observed as all hell was now about to break loose. The escort was now seen to come towards with a bone in his teeth. The transports fired their deck guns in every direction but the right one. Depth charges were also dropped.

1255 hours - The escort was seen to fiercely depth charge the original firing point and then to close in our general direction. Crevalle remained at periscope depth until the escort headed directly for the submarine at 1305 hours when shee went deep and took evasive action.

1325 hours - Returned to periscope depth. Nothing in sight except one ship hull down to the northward.

1535 hours - A bomb exploded some distance off.

1537 hours - Sighted a 'Val' aircraft circling overhead. Went deep.

1552 hours - Heard two bombs explode.

1600 hours - Heard one bomb explosion.

1603 hours - Another bomb explosion. All quiet afterwards.

1813 hours - Surfaced.

15 Nov 1943USS Crevalle (Cdr. H.G. Munson, USN) torpedoed and sank the Japanese army cargo ship Kyokko Maru (6783 GRT, built 1920) west of Manila, Philippines in position 14°53'N, 119°56'E.

(All times are zone H, -8)
0822 hours - In position 14°54'N, 119°54'E sighted a ship in the fog at a range of 6000 yards. Started attack. The ship was zig-zagging radically on base course 150°(T).

0833 hours - In position 14°53'N, 119°56'E fired four torpedoes from 900 yards. One hit was obtained. Went deep and swung right at full speed. While passing the target breaking up noises were heard through the hull. The screws of the target stopped and were not heard again. Two small escorts were heard while we were deep. They started dropping depth charges and at one time one dropped a pattern of six rather close but they caused no damage.

1002 hours - At periscope depth. All clear.

18 Nov 1943USS Crevalle (Cdr. H.G. Munson, USN) claims to have sunk a Japanese escort carrier in the South China Sea east of Luzon, Philippines in position 15°08'N, 119°38'E.

(All times are zone H, -8)
1840 hours - In position 14°55'N, 119°47'E obtained SJ radar contact to the south-west on a large target at a range of 11500 yards. Stopped. Commenced tracking from ahead. A small target was near the large target, this was thought to be an escort. The plot showed the target to be zig-zagging wildly using a very radical plan with long legs with a short plan superimposed on the long legs, a method which, because of the difficulty of solution is suggested for consideration to our own surface forces. Targets base course was 330(T), speed 19 knots. It was very difficult to get into a fouvourable attack position but in the end the target changed course towards.

2015 hours - In position 15°08'N, 119°38'E fired six bow torpedoes from 1500 yards at the target which was thought to be an aircraft or escort carrier. A large explosion was seen near the bow of the enemy. Debris and water shot 500 feet into the air. The escorting destroyer, thought to be of the Mutsuki-class, now came towards.

2329 hours - After sound contact with the destroyer had been lost planed up to periscope depth. Made a periscope and radar search all around while at 45 feet. No contacts.

2335 hours - Surfaced.

26 Nov 1943USS Crevalle (Cdr. H.G. Munson, USN) claims to have sunk a Japanese transport of about 4000 tons in the South China Sea east of Luzon, Phillipines in position 15°24'N, 119°44'E.

(All times are zone H, -8)
25 November 1943
2322 hours - In position 15°24'N, 119°44'E made sight contact on a Maru of about 4000 tons to the southward. Commenced tracking. His base course was 345°(T), speed 8 knots.

26 November 1943
0022 hours - Submerged 1200 yards off the targets main course line, presented the stern tubes and waited while still tracking the enemy by sound and radar.

0041 hours - In position 15°24'N, 119°44'E fired four stern torpedoes. The first torpedo prematured but the second and third torpedo hit the target. The screws of the target speeded up but then stopped and were not heard again. The radar pip disappeared. The was no escort for this Maru. Surfaced. Cleared the area and headed for Fremantle, Australia as the four torpedoes fired in this attack were our last.

2 Dec 1943In the early morning hours, USS Crevalle (Cdr. H.G. Munson, USN), made the southbound passage of Lombok Strait on the surface.

At Fremantle she was refitted by a relief crew from Submarine Division 161 and Submarine Repair Unit no.137.

30 Dec 1943USS Crevalle (Cdr. H.G. Munson, USN) departed from Fremantle for her 2nd war patrol. She was ordered to patrol in the South China Sea. Before she proceeded on patrol exercises were carried out together with USS Isabel (Lt. K.F. Landis, USNR).

For daily and attack positions of USS Crevalle during this patrol see the map below.

2 Jan 1944USS Crevalle (Cdr. H.G. Munson, USN) made a short stop at Exmouth Gulf to top off with fuel before proceeding towards her patrol area.

7 Jan 1944USS Crevalle (Cdr. H.G. Munson, USN) attacked a Japanese submarine in the Java Sea in position 06°10'S, 116°39'E. This was most likely the Japanese submarine RO-112 that was en-route to Surabaya from Japan.

(All times are zone H, -8)
0530 hours - In position 06°10'S, 116°39'E sighted a submarine to the northward on an opposite course. Assumed it to be a US submarine of whose presence we were not advised, asked him who he was by signal lamp in plain language. Received the correct challenge and replied to it, but noted tht he reversed course. Asked him who he was again and got an unreadable signal back. Commenced closing. He again turned south and we passed him abeam at a range of 3000 yards. His silhoutte was now seen to be anything but US so asked him who he was again an again received the correct challenge. Now saw what appeared to be two white characters painted on the side of the conning tower. I was for a moment thought that the contact was British or Dutch, as the silhoutte vaguely resembled but then he would be out of his area a lot (This is a strange passage in the patrol report, No British or Durch submarine was operating in these waters at the given time). The contact now rapidly swung around to present a 90 degree port track.
Simultaneously the two white characters on his conning tower resolved themselves into the Japanese merchant flag and the submarine was identified as being one of the Japanese RO-class. Enemy course 160°(T), speed 8 knots.

0540 hours - Brought the stern tubes to bear and fired two torpedoes from a range of 1800 yards as the enemy was in the act of submerging. Both torpedoes prematured when 600 yards from Crevalle. Proceeded to clear the area at full speed.

(All times are zone H, -8)
1300 hours - Found a small sailing vessel, sampan hull, two masts. Fired two rounds of 20mm ahead of him whereupon the crew, which did not look native, doused sails and hid in the ships covered postion refusing to come out. Destroyed the sailing vessel with 20mm. A total of 120 rounds were used. Then proceeded towards the Sibutu passage at 10 knots.

26 Jan 1944USS Crevalle (Cdr. H.G. Munson, USN) torpedoed and sank the Japanese transport Busho Maru (2567 GRT, built 1921) in the South China Sea about 175 nautical miles south-east of Cape St. Jacques, French Indo-China in position 08°27'N, 109°12'E.

(All times are zone H, -8)
0345 hours - In position 09°32'N, 111°25'E made radar contact on a large transport with a small trawler-catcher type escort. Tracked from ahead. Determined the base course of the enemy as 220°(T), speed 8 knots. Worked into a position for a submerged radar attack.

0435 hours - Submerged to radar depth. The target changed it's base course to 250°(T) so the attack had to be broken off.

0548 hours - Surfaced and commenced an end around.

0617 hours - Submerged and commenced another attack. Unable to close enough so the attack had to be broken off again.

0804 hours - Surfaced. Range to the enemy was now 12 miles. Started another end around run.

1349 hours - Submerged on the enemy's track and commenced a conventional periscope approach and attack. In the final stages of the attack the enemy again changed course so this attack was also broken off.

1758 hours - After having tracked them out to 12 miles again, surfaced and commenced trailing. Then moved in position for a surface attack.

2205 hours - In our disired position for a surface attack.

2214 hours - Commenced attack on this contact for the fourth time.

2218 hours - In position 08°27'N, 109°12'E fired four torpedoes from 2500 yards. The first torpedo hit and appeared to break the ships back. She sank in about three minutes. The escort responded with dropping few depth charges at random while Crevalle retired to the southwards.

11 Feb 1944USS Crevalle (Cdr. H.G. Munson, USN) sank a small armed Japanese tug with gunfire off the east coast of Borneo in position 05°00'N, 119°06'E.

(All times are zone H, -8)
1500 hours - Observed a patrol vessel (converted tug type of about 150 tons) standing up from Alice Channel heading towards Labian Point. She was heading almost directly for us.

1555 hours - Battle surfaced. Manned the 4" gun and gave chase. The enemy speeded up and headed towards the shore. Opened fire when the range was 5000 yards. The enemy then turned towards and opened fire with a small deck gun and two machine guns. A near miss soon put all his guns out of action. A hit on the stern of the enemy blew up the depth charges and he was soon sinking. Closed and attempted to pick up the five survivors seen in the water but they refused to be picked up. Then cleared the area at 18 knots. During the action 28 rounds of 4" and 60 rounds of 20mm were fired.

15 Feb 1944USS Crevalle (Cdr. H.G. Munson, USN) attacked a Japanese convoy north of Halmahera. Hits on five ships are claimed but this could not be confirmed post-war.

The convoy attacked was convoy M-12 made up of the transports Mizuho Maru (8506 GRT, built 1912), Fuso Maru (8195 GRT, built 1909), Mitsuki Maru (6440 GRT, built 1943), Kenwa Maru (6384 GRT, built 1942), Tonegawa Maru (4999 GRT, built 1913), Kurogane Maru (2845 GRT, built 1943) and Wales Maru (6586 GRT, built 1921). They were escorted by the Japanese minesweepers W-4 and the Japanese patrol vessel PB-105.

(All times are zone H, -8)
1042 hours - In position 04°07'N, 129°09'E sighted smoke bearing 090°(T), distance about 16 nautical miles. The contact developed into a convoy of seven transports. Another transport, a staggler, was about 8 nautical miles behind the main convoy. Commenced tracking and intended to attack at night.

1718 hours - Commenced working into a position to attack from.

2008 hours - Went in to attack.

2033 hours - In position 05°10'N, 128°43'E fired six bow torpedoes. Ranges were around 2700 yards. Four hits are claimed on three of the transports.

2036 hours - Fired the three remaining stern torpedoes. Two hits are claimed on two other transports. Went full ahead to clear the scene.

4 Apr 1944USS Crevalle (Cdr. F.D. Walker, Jr., USN) departed from Fremantle for her 3rd war patrol. Once again she was ordered to patrol in the South China Sea.

For daily and attack positions of USS Crevalle (though not complete) during this patrol see the map below.

11 Apr 1944USS Crevalle (Cdr. F.D. Walker, Jr., USN) arrived at Darwin to top off with fuel. She was escorted in by HMAS ML 809 (T/Lt. I. Holm, RANVR).

She departed for her patrol area later the same day.

25 Apr 1944USS Crevalle (Cdr. F.D. Walker, Jr., USN) torpedoed and sank the Japanese army cargo ship Kashiwa Maru (976 GRT, built 1918) north of Borneo near the Balabac Strait in position 07°09'N, 116°48'E.

1142 hours - Range to the target now 10000 yards. Submerged on the starboard bow of the target. Went to battle stations.

1210 hours - Identified the target as a large freighter very lightly laden but with two aircraft on the main deck aft. In column behind the target were two small sea trucks. A small escort, possibly a converted yacht, was to starboard of this column.

1246 hours - Observed the first torpedo to hit amidships with a tremendous explosion which lifted tons of debris into the air. A second torpedo hit was heard but not observed as we were trying to adjust a camera to the periscope.

1248 hours - The target was obscured by a huge cloud of smoke except for the bow which was separated from the rest and sinking rapidly with a large up angle. When the smoke cleared away the target was gone. Both sea trucks and the escort turned away and made for Balambangan Island.

1258 hours - Surfaced and ran through wreckage taking pictures. About 50 survivors were seen in the water. Decided not to take prisoners.

1315 hours - Departed the scene for deeper water.

3 May 1944USS Crevalle (Cdr. F.D. Walker, Jr., USN) claims to have sunk a medium sized tanker between Miri and Labuan. This claim could not be confirmed post-war. Later, early on May 4th, Crevalle made another torpedo attack on a smaller tanker with four torpedoes but no hits were obtained.

(All times are zone H, -8)
3 May 1944
1750 hours - In position 04°42'N, 116°57'E sighted masts of a ship bearing 189°(T) heading north along the coast. Commenced approach.

1832 hours - The target now changed course to 033°(T). Range now 8500 yards. Target tracked at 10 knots. Identified the target as a medium tanker.

1838 hours - Range now 7400 yards. Picked up the stack and superstructure of another ship well aft of the target.

1843 hours - Target now on course 025°(T), range 6200 yards. The ship behind now looked like a small tanker.

1852 hours - The target changed course to 050°(T). Range was now 4100 yards. The smaller ship was now definately seen to be a small tanker.

1857 hours - Closest range now, 4000 yards. Decided to break off the attack, make and end around and attack at night.

1910 hours - Lost sight of the targets.

1920 hours - Came to 45 feet for a radar sweep. Picked up the targets at bearing 152°(T), range 6000 yards. Returned to 60 feet. Could not see the contact through the periscope.

1930 hours - Again came to radar depth (45 feet) for an SJ sweep. Contact now bearing 152°(T), range 6000 yards. Returned to periscope depth. Still unable to see the contact through the periscope.

1945 hours - Came to radar depth for another sweep. Range now 6500 yards.

1953 hours - Lost contact at a range of 7000 yards.

1957 hours - Surfaced. Picked up radar contact on two targets bearing 140°(T), range 17000 yards. The contact at 7000 yards had disappeared. This was probably a small escort trailing the convoy.

2003 hours - Began an end around on three engines while charging on the other. Targets were checking on course 050°(T), speed 8 knots.

2227 hours - Now in a position dead ahead of the target at a range of 14000 yards. As it was almost full moon it was needed to attack submerged. Commenced attack. The target was in sight from the bridge.

2235 hours - When the range was 10000 yards submerged for a radar approach.

2258 hours - Range now 4000 yards. Dropped to periscope depth for final approach for a stern tube attack.

2308 hours - We ran into a rain squall, very difficult to make out the target.

2311 hours - Heavy rain completely obscured the target, returned to radar depth. Radar immediately picked up the target and two other contacts. Range to the target was 2700 yards.

2316 hours - Heard two timed explosions. Rain was so heavy that nothing was visible through the periscope.

2317 hours - Went deep to 150 feet.

2319 hours - Went to 180 feet. Heard a rumbling explosion.

2321 hours - Returned to periscope depth.

2328 hours - At periscope depth. We were still in the rain squall. Nothing visible through the periscope. No screws were heard on sound.

2329 hours - Came to radar depth. Radar picked up one target at a range of 4800 yards.

2331 hours - Radar picked up another small pip at 5000 yards.

2340 hours - Surfaced in the heavy rain. Radar had two contacts at a range of 6000 yards. Commenced another end around. The third pip had disappeared.

2342 hours - Heard a tremendous explosion coming from the direction of the attack which rocked the ship. Concluded that our tanker had sunk.

2345 hours - When the range was 7000 yards the small pip disappeared from the radar. The other contact tracked out to 17000 yards as before on course 050°(T), speed 8 knots.

4 May 1944
0030 hours - Rain slackened. The target was sighted at a range of 11000 yards.

0108 hours - Started surfaced attack.

0114 hours - In position 05°19'N, 114°36'E fired four bow torpedoes from 1400 yards. Observed the first three to miss ahead. The fourth torpedo ran erratic and took a course of about 30 degrees to the right. All torpedoes therefore missed. Another attack was attempted but the target ran behind a known minefield so the attack was broken off.

6 May 1944USS Crevalle (Cdr. F.D. Walker, Jr., USN) torpedoed and sank the Japanese fleet tanker Nisshin Maru (16801 GRT, built 1936) about 40 nautical miles west of Kalutan Island in position 07°19'N, 116°52'E.

0610 hours - Smoke and tops of eight ships were visible crossing the entrance of Marudu Bay. Position was 07°23'N, 116°50'E.

0622 hours - Went to battle stations. Three escorting destroyers were seen.

0627 hours - Sighted an aircraft patrolling over the convoy.

0635 hours - Sighted the tops of three more ships coming up astern of the convoy. Also two more escorts were sighted with these ships.

0642 hours - Started attack on the largest ship in the convoy, a two-stack whale factory ship most likely in use as tanker.

0701 hours - Fired four torpedoes from 900 yards. Three hits were obtained.

0702 hours - Went to 140 feet. Breaking up noises were heard. Hoped to get to deeper water before 'the fireworks' started.

0706 hours - Three depth charges were dropped. They were close. Went to 150 feet.

0707 hours - Ten close depth charges. They caused no material damage. One valve opened, some wrenches were flying around in the control room and a little cork was knocked around.

0709 hours - Two more depth charges followed shortly afterwards by seven more. Until 0733 hours we were depth charged almost continually. As each attack started went to full speed and stopped as soon as the last charge was dropped.

0733 hours - Decided to bottom as we were probably stirring up mud leaving a marker for the enemy. Bottomed in 174 feet.

0745 hours - Depth charging slacked off. There were now at least three escorts hunting overhead.

0955 hours - Came of the bottom and made off on course 280(T). The enemy was still hunting above.

1055 hours - The screws of the escorts faded out. Came to periscope depth. Could see the tops of one escort vessel dead astern.

1100 hours - Sighted a destroyer which closed to 8000 yards.

1343 hours - The tops of two escort vessels were still in sight astern.

1443 hours - The escorts were no longer in sight.

1855 hours - Surfaced.

8 May 1944USS Crevalle (Cdr. F.D. Walker, Jr., USN) departed her patrol area to conduct a special operation.

11 May 1944USS Crevalle (Cdr. F.D. Walker, USN) evacuates 28 women and children from Negros Island, Philippines. Course was then set for Darwin, Australia.

14 May 1944USS Crevalle (Cdr. F.D. Walker, Jr., USN), while en-route to Darwin and trying to attack a Japanese convoy, is damaged by depth charges east off northern Celebes in position 00°57'N, 125°51'E.

1058 hours - The first string of eight depth charges. They were very close and caused a lot of mostly minor damage.

1059 hours - Increased depth to 450 feet. All sound gear was out of commission.

1104 hours - A second barrage of eight depth charges was dropped. Again close but above us. These were the last depth charges dropped.

1500 hours After being hunted for almost four more hours, during which the enemy failed to gain contact on Crevalle, no more screws were heard on sound (by now partially repaired). Remained deep to effect more repairs to our damage as possible.

1630 hours - Planed up to 150 feet.

1730 hours - Planed up to 65 feet to test the periscopes. Both were found to be smashed so returned to 150 feet.

1840 hours - Surfaced. Started a battery charge. More damage was found on deck.

19 May 1944USS Crevalle (Cdr. F.D. Walker, Jr., USN) arrived at Darwin, Australia where her passengers were disembarked. Upon arrival she was escorted in by HMAS ML 815 (T/Lt. F.J. Horsfield, RANVR). She also underwent some minor repairs before departing for Fremantle the following day.

(All times are zone H, -8)
0555 hours - In position 07°16'S, 116°17'E sighted what was thought to be a patrol vessel at a range of 4 nautical miles. Dived.

0645 hours - Picked up target in periscope. It was seen to be a small motor sampan apparently fishing. Decided to watch him for a while.

0900 hours - Ran into fishing buoys. Decided to surface, knock off the sampan and then be on our way.

0905 hours - Surfaced. Besided the sampan another sailing vessel was in sight. Began closing the sampan at high speed.

0925 hours - Opened fire with the 4" gun from 1200 yards. Fired 18 rounds for at least 7 hits. It was thought that the sampan was used for observation purposes and was equipped with radio.

0933 hours - After the 18th round the deck gun malfuntioned. The target was well holed and listing way over to starboard. Secured the deck gun and opened fire with 20mm. Put 10 pans of 20mm into the sampan and then cleared out. He was obviously sinking.

26 Jul 1944USS Crevalle (Cdr. F.D. Walker, Jr., USN) attacked the Japanese convoy HI-68 in the South China Sea. Crevalle was part of a wolfpack together with USS Flasher (Cdr. R.T. Whitaker, USN) and USS Angler (Cdr. F.G. Hess, USN).

In the afternoon of the 25th Crevalle made a failed torpedo attack on a Japanese freighter. The Japanese freighters Aki Maru and Tosan Maru reported being missed.

Around 0215 hours on the 26th, USS Flasher torpedoed and sank the tanker Otorisan Maru, which exploded and illuminated the night. The transports Aki Maru and Tosan Maru were damaged.

Around 0430 hours the already damaged Aki Maru was torpedoed and sunk by Crevalle.

Around 1030 hours, Crevalle torpedoes and further damaged the Tosan Maru.

(All times are zone H, -8)
25 July 1944
0603 hours - Received a message from USS Angler that she was in contact with a 10 ship convoy bearing 115°(T), distance 14 nautical miles.

0620 hours - Sighted smoke bearing 105°(T). Through high periscope sighted tops of several large ships. Position was 14°43'N, 117°13'E.

0621 hours - Received a message from USS Angler that the course of the convoy was 305°(T) to 010°(T).

0637 hours - The tops of the convoy were now clearly in sight. We were getting too close. Commenced an end around.

0702 hours - Received a message from USS Flasher that he had the convoy in sight bearing 215°(T), distance 14 nautical miles from position 15°17'N, 117°14'E. The base course of the convoy was 335°(T), speed 8 knots.

0814 hours - Sighted a four engine patrol plane in the direction of the convoy at long range.

0821 hours - The aircraft turned towards us and closed the range rapidly. Dived and kept the plane in sight through the periscope.

0925 hours - The aircraft flew back towards the convoy. It soon passed out of sight.

0930 hours - Surfaced. Sighted the aircraft immediately. At this time the convoy was out of sight. We could not close because of the aircraft.

1041 hours - Sighted a second patrol plane near the convoy.

1050 hours - Picked up smoke again from the convoy bearing 115°(T).

1201 hours - Flasher reported the convoy bearing 015°(T), distance 15 nautical miles from position 15°35'N, 116°53'E. Course of the convoy was 010°(T), speed 9 knots. By this time we were getting well ahead of the convoy.

1331 hours - Now well ahead of the convoy. Changed course to close the range.

1340 hours - Dived for attack. Position was now 16°26'N, 117°04'E.

1350 hours - The convoy was completely obscured by a rain squall.

1408 hours - Convoy still obscured by rain.

1427 hours - Still unable to see any ships. The convoy's screws were drawing to the northward.

1435 hours - Sound reported fast screws very close bearing 070° relative. Made out the outline of a Fubuki class destroyer dimly through the rain. He disappeared almost immediately. We now heard loud screws all around and concluded we were in the middle of the convoy but we could not see a single ship.

1443 hours - Made out a large 4 goal post Maru bearing 245°(T). Started attack for a stern tube shot.

1444 hours - In position 16°21'N, 117°07'E fired four stern torpedoes. While firing two more large Maru's were seen following the one fired at. Commenced attack at these ships with the bow tubes.

1445 hours - The after torpedo room reported that we were taking in water fast through tube no.10. The outer door or poppet could not be closed. The boat lost trim and started coming up.

1446 hours - Broached in the middle of the convoy. By now it was clear the all four torpedoes that had been fired had missed the target.

1447 hours - Flooding stopped in the after torpedo room with the bilge about two thirds full. Went deep.

1450 to 1500 hours - First depth charge attack by four or five escorts. Thirty-two depth charges were counted but none were really close.

1500 to 1502 hours - A second and most accurate depth charge attack in which twenty depth charges were dropped very close.

1502 to 1542 hours - Screws and pinging of three or four escorts overhead.

1557 hours - One escort came up the starboard side and dropped six depth charges not too close.

1615 hours - Screws all dropping aft.

1655 hours - Screws faded out but pinging was still heard. Started coming up to periscope depth. As pinging sometimes was coming nearer the ascent was halted several times.

1755 hours - At periscope depth, pinging was still faintly heard astern. Picked up the tops of two escorts. Position was 16°18'N, 117°01'E.

1822 hours - The tops of both escorts disappeared. Could still heard very faint pinging.

1900 hours - All clear on sound and periscope. Surfaced. Commenced end around on the convoy.

1927 hours - Sent a message to Flasher with the results of our attack.

1937 hours - Radar contact on the two escorts that had hunted us last bearing 052°(T), range 15000 yards. Decided to hold course for a while and tracked them.

0109 hours - Flasher reported the position of the convoy as 7 nautical miles bearing 198°(T) from position 18°02'N, 117°51'E.

0146 hours - Flasher reported that she was going in for an attack from port.

About 0220 hours - A tremendous explosion lighted up the whole area as Flasher opened up the vents in a big tanker. Light was so bright that several ships could be seen although the range was still about 12 nautical miles. Picked up the silhoutte of a second ship with a large column of smoke coming from it. Also at this time radar reported a third ship pulled out of the convoy as though damaged. The light from the burning tanker persisted until dawn and probably could be seen from a range of a hundred miles.

0242 hours - Picked up radar contact on a trailing escort bearing 060°(T), range 11000 yards. Made an end around on this escort.

0403 hours - Sighted gunfire bearing 085°(T). This was believed to be Angler attacking. At this time it seemed that we would have a hard time attacking before dawn. After the attack by Angler the convoy seemed to stop or slow down drastically. This gave Crevalle a change to attack immediately.

0410 hours - Went to battle stations. The convoy was now in two sections. The port section consisted of two large ships with an escort on the port bow. The starboard section had one large and two smaller ships presumably with the rest of the escorts.

0419 hours - The selected targets zigged away.

0422 hours - Changed course to close the range at flank speed.

0430 hours - In position 18°28'N, 117°59'E fired five bow torpedoes from 2900 yards at two overlapping targets.

0433 hours - After having swung fired four stern torpedoes from 2900 yards at the same targets. Shortly after firing this second salvo two hits from the first salvo were observed on the after target. The first hit threw a huge column of black smoke high in the air.

0435 hours - Observed one and heard three timed hits on the forward target. This stopped him and he began to take an up angle.

0437 hours - Fireworks started on the after target as though ammunition was exploding. A series of explosions was observed and this ship sank.

0443 hours - Fireworks started up from small explosions on the forward target. He now definitely had a large up angle. Radar had contact with him and his pip was getting smaller.

0444 hours - The trailing escort was coming up fast at a range of 15000 yards and now had us against the light background of the dawn. The escort from the bow of the targets was now coming back towards us.

0446 hours - Dived.

0447 hours - Heard a tremendous explosion and breaking up noises on the bearing of the forward target.

0500 hours - Picked up pinging on the sound gear. Sighted the bow of the forward target through the periscope. This was seen to sink about 10 minutes later.

0520 hours - Picked up pinging from five ships though none were sighted. They were to the westward and had a rain squall as background.

0522 hours - Sighted the tops of an escort bearing 295°(T). Apparently the leading escort.

0525 hours - Made out tops of a destroyer bering 288°(T). Looked like a Fubuki-class destroyer. Position was 18°23'N, 117°56'E.

0534 hours - All tubes forward were ready. The last destroyer sighted now turned towards and gave zero angle on the bow. Speed ws estimated at 27 knots. Went deep to 400 feet.

0536 hours - The destroyer passed overhead but no depth charges were dropped. However as soon as he passed he turned back and went down the port side close aboard but again no depth charges were dropped.

0536 to 0646 hours - The screws of two ships continued to be heard loud and close. These made several runds that sounded like attacks but no charges were dropped.

0730 hours - Screws faded out but pinging was still heard.

0736 hours - Started coming up but screws and pinging were coming closer so stayed at 300 feet.

0745 hours - Screws faded out again and pinging was very faint. Began coming up.

0824 hours - All clear on periscope. Pinging was still heard in the distance. Decided that the escorts were still too close for surfacing.

0850 hours - Sighted the goal posts of a large Maru. The target was stopped. Began approach.

0900 hours - Picked up pinging of two escorts. These appeared to be circling the target slowly. Got a good look at one of the escorts, it looked like a W 13-class minesweeper but the stack was much further aft.

0951 hours - Went to 250 feet for a high speed approach.

1023 hours - Started to return to periscope depth.

1026 hours - At periscope depth. The target was right on the bearing at a range of 2200 yards. No damage could be seen on the target through the periscope.

1027 hours - In position 18°13'N, 117°56'E fired four torpedoes from 2200 yards.

1028 hours - Observed the first torpedo to hit amidships. A sheet of flame rose higher than the target's stack. Observed a second torpedo hit, also amidships throwing up much smoke and debris. All four torpedoes were heard and timed as hits.

1029 hours - We took some pictures through the periscope of the damaged ship. Received an aircraft bomb, close aboard. Went deep fast.

28 Jul 1944USS Crevalle (Cdr. F.D. Walker, Jr., USN) attacked a Japanese convoy off the west coast of Luzon. Six torpedoes were fired but the results could not be obsvered. Crevalle was depth charged following this attack.

(All times are zone H, -8)
0905 hours - In position 16°22'N, 119°44'E sighted the tops of a large steam vessel bearing 230°(T). Started approach.

0920 hours - There were now several ships in sight. Counted about eight ships with four or more escorts. The leading escort looked like a Chidori-class torpedo boat. Picked a large Maru with cage masts as the target. It is thought to be some sort of naval auxiliary.

0938 hours - In position 16°18'N, 119°44'E fired six bow torpedoes from 2500 yards. Went deep upon completing firing the torpedoes as one of the escorts was near. Heard two timed hits while going deep.

0945 hours - A pattern of four depth charges was dropped. These were close but came later then expected.

0952 hours - Another pattern but now of ten depth charges. They were very close but caused no damage. Crevalle was now at 450 feet.

1006 hours - Eleven more depth charges and close.

1020 hours - Eight charges, very close.

1105 hours - Seven more charges, close. Shut down every equipment not needed. Went to 500 feet.

1155 hours - Eight close depth charges.

1205 hours - Went to 550 feet.

1215 hours - The escort dropped astern for another run but he then appeared to have lost contact.

1330 hours - Increased speed a bit and went back to 500 feet.

1333 hours - Three more depth charges, but not very close now.

1421 hours - Now only heard faint pinging on sound.

1445 hours - Came up to 400 feet and retrimmed the boat. Faint pinging was still heard but no screws.

1630 hours - All clear on sound now for a while. Started up the gyro and ventilation.

1750 hours - Pinging came back in on the starboard beam. Changed course to evade.

1 Sep 1944USS Crevalle (Cdr. F.D. Walker, USN) departed from Fremantle for her 5th war patrol. She was ordered to patrol in the Philippines.

For daily positions (though incomplete) of USS Crevalle during this patrol see the map below.

7 Sep 1944USS Crevalle (Cdr. F.D. Walker, USN) topped off with fuel at Darwin before proceeding towards her patrol area later the same day.

11 Sep 1944USS Crevalle (Cdr. F.D. Walker, USN) nearly had a fatal diving accident. She was however damaged in such a way that she had to abort her patrol. Two crew were washed overboard. The Officer of the Deck, Lt. H.J. Blind, USNR was seen in the water but by the time Crevalle had turned he was gone. The other crewmember, a lookout, was recovered from the water.

It was due to one of the crew, R.L. Yaeger, that the boat was saved. He knew something was wrong but could not reach an officer for orders. On his own initiative he then gave orders to back down full thus saving the boat that was plunging to the deep with the conning tower hatches open. It is also thought that Lt. Blind remained with the upper conning tower hatch until he managed to unlatch it allowing it to close with the flow of the water.

9 Apr 1945USS Crevalle (Cdr. E.H. Steinmetz, USN) damaged a Japanese auxiliary submarine chaser and a trawler with gunfire east of Kyushu, Japan in position 32°33'N, 128°25'E. The action had to be broken off due to return fire from the enemy. Crevalle dived and was then hunted and depth charged but escaped without damage.

0810 hours - Identified the targets as a auxiliary submarine chaser and a trawler. Range was now 6200 yards. Considered the targets too small for torpedo fire. Decided to battle surface and attack the auxiliary submarine chaser first.

0905 hours - Surfaced at a range of 10000 yards.

0917 hours - Range now 5500 yards. Opened fire on the auxiliary submarine chaser. The trawler turned and gave us a 40 degree port angle on the bow. Maneuvered to keep him there. 5" now concentrated on the trawler and 40mm on the auxiliary submarine chaser. The range closed to 2500 yards and the enemy was trying to box us in. The auxiliary submarine chaser was firing 40mm while the trawer was firing 3" and possibly also 40mm. Several hits and close missed were obtained on the trawler with the 5" gun. Our forward 40mm meanwhile had jammed after firing only 8 rounds. The after 40mm was still banging away at the auxiliary submarine chaser and obtained serveral hits. At one stage the auxiliary submarine chaser turned away.

0930 hours - After 104 rounds the after 40mm also jammed. Decided to break off the action. Secured all guns.

0936 hours - Dived and rigged for silent running and depth chaging. Range to the enemy was now 4000 yards.

0942 hours - Went to 350 feet. Two depth charges were dropped, not close.

0945 hours - Two more depth charges.

0952 hours - Two more depth charges.

0958 hours - One depth carge to port and above.

1007 hours - One depth charge astern to starboard and below.

1010 hours - One more depth charge to starboard and above.

1054 hours - Two more depth charges quite some way off.

1103 hours - At periscope depth. All clear. One more depth charge was now dropped quite some way off again.

1111 hours - No contacts with ST radar.

1128 hours - Heard one explosion.

1130 hours - Secured from battle stations. During the action a total of 43 rounds of 5" and 112 rounds of 40mm had been fired.

2205 hours - A loud explosion coming from the direction of the target. Radar could not pick him up anymore. Considered the target must have sunk.

10 Jun 1945USS Crevalle (Cdr. E.H. Steinmetz, USN) torpedoed and sank the Japanese army cargo ship Daiki Maru (2217 GRT, built 1944) in the western approaches to Tsugaru Strait in position 40°44'N, 139°48'E.

Earlier that day Crevalle had attacked a tug with one torpedo that broached resulting in the tug avoiding it by just a few feet.

(All times are zone I, -9)
0730 hours - Sighted smoke and a mast bearing 021°(T) in position 40°44'N, 139°52'E.

0848 hours - Battle stations. The contact developed into a tug towing some sort of raft. Enemy course was 190°(T), speed 3.5 knots. Decided to fire a torpedo at the tug.

0955 hours - Fired a bow torpedo from 800 yards. The torpedo broached and the tug managed to evade it by only a few feet.

1452 hours - Manned battle stations. Three small transports and two escorts were seen to make up this convoy.

1522 hours - One of the escorts was close. Decided to fire a down the throat shot at her.

1525 hours - Fired three torpedoes from 1200 yards. No hits were obtained.

1537 hours - Four depth charges, not close.

1538 hours - Six more depth charges, but again not close.

1539 hours - One single depth charge.

1545 hours - Four more depth charges.

1626 hours - Two distant depth charges. Crevalle was at 400 feet working to seaward. Pinging was heard for serveral more hours but no more depth charges were dropped.

18 Jun 1945USS Crevalle (Cdr. E.H. Steinmetz, USN) attacked a small Japanese transport out of a group of three with one torpedo in the Sea of Japan, south of the Tsugaru Strait. The torpedo missed the target.

(All times are zone I, -9)
1121 hours - In position 39°50'N, 139°42'E sighted three small transports heading south.

1209 hours - Fired a bow torpedo from 2400 yards. It missed and exploded on the beach.

19 Jun 1945USS Crevalle (Cdr. E.H. Steinmetz, USN) attacked two Japanese transport vessels with two torpedoes in the Sea of Japan, south of the Tsugaru Strait. No hits were obtained.

(All times are zone I, -9)
0855 hours - In position 39°58'N, 139°40'E sighted two transports on a southerly course.

0912 hours - Commenced attack. We were only 4000 yards from the beach.

0942 hours - In position 39°58'N, 139°40'E fired two bow torpedoes from 1300 yards at the partly overlapping targets.

0945 hours - Heard two explosions, most likely the torpedoes hitting the beach.

20 Jun 1945USS Crevalle (Cdr. E.H. Steinmetz, USN) attacked a Japanese convoy with two torpedoes in the Sea of Japan, south of the Tsugaru Strait. No hits were obtained.

(All times are zone I, -9)
0940 hours - In position 40°42'N, 139°57'E sighted two transports of about 2000 tons each and most likely our frigate friend we had encountered twice last night. Closed.

1000 hours - Battle stations.

1025 hours - Commenced attack. Enemy course 040°(T), speed 8 knots. Selected the second transport as target. Could not get as close as desired.

1052 hours - In position 40°42'N, 139°56'E fired two bow torpedoes from 2600 yards. Both missed.

21 Jun 1945USS Crevalle (Cdr. E.H. Steinmetz, USN) attacked a convoy with three torpedoes in the Sea of Japan off the west coast of Hokkaido. No hits were obtained.

(All times are zone I, -9)
1151 hours - In position 42°35'N, 139°37'E sighted a convoy made up of a 4000 tons transport and a smaller one of about 2000 tons. They were escorted by a large frigate or destroyer. This was the same convoy that we sighted yesterday just after completing our failed attack and we were unable to attack, hopefully we would have better luck today. Manned battle stations and commenced approach.

1242 hours - In position 42°35'N, 139°48'E fired three stern torpedoes from 2800 yards. All three torpedoes were seen to explode on the beach.

1254 hours - Depth charging started, until 1303 hours a total of 10 were dropped single or in pairs but they were all distant.

1307 hours - One depth charge, closer.

1308 hours - Two depth charges, closer.

1309 hours - At 275 feet.

1326 hours - Pinging was getting weaker.

1353 hours - Returned to periscope depth. The escort was sighted bearing 030°(T), range 5000 yards. An aircraft was also seen patrolling the area.

1359 hours - Had another look. The aircraft was still patrolling the area. Also the escort remained in the area. Went deep to 350 feet.

2040 hours - Surfaced. The escort was last seen erly in the evening but pinging was still heard in the area.

22 Jun 1945USS Crevalle (Cdr. E.H. Steinmetz, USN) torpedoed and damaged the Japanese frigate Kasado off the west coast of Hokkaido, Japan in position 43°23'N, 139°47'E. The bow of Kasado was blown off, she never became operational again.

(All times are zone I, -9)
21 June 1945
2306 hours - In position 43°19'N, 139°39'E obtained SJ radar contact bearing 340°(T), range 12300 yards. Commenced tracking. The contact was pinging and had radar. It is thought to be yesterdays 'friend'.

22 June 1945
0006 hours - Manned battle stations. We were already ahead of the target and our battery charge was almost completed.

0008 hours - Range to the target was now 9000 yards. The target was zigging between 060°(T) and 120°(T) at a speed of 11.5 knots.

0009 hours - Submerged.

0037 hours - Can see the target plainly through the periscope.

0041 hours - Setup looked very good, target now at 1800 yards.

0047 hours - In position 43°23'N, 139°47'E fired two stern torpedoes for a torpedo run of 650 yards. Went deep on firing. One torpedo hit was heard.

0050 hours - Started to come up. Pinging had stopped after the torpedo explosion. Screws were still heard on the bearing of the target but much slower.

0054 hours - Heard a loud explosion. No more screws were picked up on sound.

0101 hours - Periscope depth. Sighted the target. It was thought the target had overturned or was on his side.